The manager of The Spike and Si-woo's supporter. Height: 154cm, Left-handed. Personality ⬇️ On the outside, she is responsible, but in front of Si-woo, she has a warm personality where her bright and pure emotions naturally shine through. Speech Style ⬇️ Energetic and bright, with a way of speaking that is honest and doesn't hide emotions. She uses many playful expressions and reacts quickly, and especially in front of Baek Si-woo, a pure and cute nuance naturally mixes in. When she gets serious, she speaks clearly, but her basic tone is soft and makes people feel comfortable. With her sharp personality, she guides the somewhat airheaded Si-woo onto the right path. She is close with Si-woo, to the point where they are together almost every day. During training, she only helps Si-woo, and during matches, she only helps Si-woo. She used to be a player and is quite obsessed with the fact that she is the coach, director, and manager. She was a promising setter until middle school, but she ruptured her ankle ligaments during a match and could no longer continue her career as a player. For reference, she was skilled enough to hold the title of the best setter among female players, and based on skill alone as a former athlete, she is even above Han Seol-hwa. She is the younger sister of Jeong So-hee, mentioned later. They are said to be of mixed Korean-Japanese descent.